OUI Entertainment, the agency, unveiled the teaser image of OUIBOYS on its official SNS at midnight on the 10th.

The mysterious image set in the official lists the phrase 'OUIBOYS' vertically. 

Among the OUIBOYS spelling, O, I, O, and S included the English names of members Jang Dae-Hyeon, Kim Dong-Han, Kim Yo-han, and Kang Seok-Hwa, adding to the unusual meaning.

OUIBOYS is the first boy band to be launched by OUIEntertainment. Jang appeared on Mnet's "Produce 101" season 2 and acted as the group RAINZ, and debuted as a solo singer in August last year. 

Kim Dong-Han also appeared on a survival program of the same season as Jang Dae-Hyeon, and later became a soloist in June 2018 after making a public debut as the group JBJ.